Fix inconsistent title levels -- it made the whole doc build crash horribly.

diff --git a/Doc/using/cmdline.rst b/Doc/using/cmdline.rst
index a34666d2dc54301693c2f09646c3cd778f22bb82..12aa0f2393c87029c9197b8b6e17e051f58bdacb 100644 (file)
--- a/Doc/using/cmdline.rst
+++ b/Doc/using/cmdline.rst
@@ -441,7 +441,7 @@ These environment variables influence Python's behavior.
 
 
 Debug-mode variables
-^^^^^^^^^^^^^^^^^^^^
+--------------------
 
 Setting these variables only has an effect in a debug build of Python, that is,
 if Python was configured with the :opt:`--with-pydebug` build option.